Quotables
"The Americans have need of the telephone, but we do not. We have plenty of messenger boys."
Sir William Preece, chief engineer, British Post Office ; 1878
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| Number | Title | Issue Date |
| 7142640 | Method and system of remotely restoring communication lines The disclosure relates generally to a system of restoring communication circuits. The system includes an automated circuit switchover system embedded within a telephone central office, a technician terminal for use by telephone network operations personnel, a test a... | 11/28/2006 |
| 7103159 | Off-hook notifier A method for handling an off-hook event can include the step of detecting an off-hook event with a modem communicatively linked to a circuit loop in which the off-hook event occurs. The detection can be based upon audible information conveyed within the circuit loop... | 09/05/2006 |
| 6690768 | Power cutback configuration of digital subscriber line transceivers using public switched telephone network signaling The invention provides a technique for power cutback of DSL transceivers (e.g., modems) using public switched telephone network (PSTN) signaling. For example, one or more dual-tone/multiple frequency (DTMF) signals generated by a touch-tone telephone, or ... | 02/10/2004 |
| 6453017 | Extended off-hook notification via electronic communications Apparatus and method to generate an alternative receiver off-hook (AROH) notification signal to a user of a telephone system suffering from an extended off-hook condition. The alternative receiver off-hook notification signal may be, e.g., an e-mail messa... | 09/17/2002 |
| 6298119 | System and method for digital telephone trouble reporting A system and method for telephone trouble reporting. One aspect of the present invention is a context-sensitive graphical user interface (GUI). The GUI allows a user to select a trouble reporting option at various stages of a telephone call in a telephony... | 10/02/2001 |
| 5812658 | Method and circuit for failsafe switch-hook detection during fault in a telephone system A circuit and method for maintaining switch-hook detection (SHD) in the presence of a fault in a telephone system may include a comparison of one of a tip current and a ring current to a reference current. A switch-hook detection indicates that a request ... | 09/22/1998 |
| 5802151 | Telephone interface protection circuit and modem using same A telephone interface protection circuit and modem incorporating the telephone interface protection circuit. The circuit includes a sensing circuit and a determining circuit. The interface protection circuit checks for an active telephone line and checks ... | 09/01/1998 |
| 5450468 | Method of rapidly assessing damage to outside loop plant From time-to-time, the telephone outside loop plant is severely damaged as a result of some catastrophe, such as a hurricane. To facilitate the repair and identification of such damage, a facility is provided which rapidly assesses and outputs to a termin... | 09/12/1995 |
| 5428662 | Detecting make-break clicks on a telephone line Method and apparatus for detecting make-break clicks on a telephone line, i.e., clicks produced by going on-hook or off-hook. A click is detected by analyzing time slices of a telephone signal to detect a sharp positive transition in signal energy followe... | 06/27/1995 |
| 5357556 | System and method for telephone network testing A system and method for testing equipment in a telephone network is disclosed for remote maintenance and verification of subscriber loops. The system and method accommodates known AC and DC fault testing techniques while improving reliability by providing... | 10/18/1994 |
| 4366350 | Control system for telephone switching system A telephony system with automatic test calling. Test access circuitry connected to port circuits enables the test call circuit to select actual ports for a test call and monitor the test call signals. Test calls are initiated either on a periodic basis on... | 12/28/1982 |
